Grating



Aug.22,1944; HH; BUNKER 2,356,502

GRATING Fiied oct. 15, 1942 Patented Aug. 22, 1944 GRATING Herbert H.Bunker, Jersey City, N. J., assg'nor to Kerlow Steel Flooring Company,Jersey City, N. J., a corporation of New Jersey Application October 15,1942, Serial No. 462,102 s claims. (ci. 94-30) This invention relates tonon-metallic gratings suitable for use as ventilated ooring. Among theobjects of the invention is to provide a nonmetallic grating structurehaving wearing and anti-slip characteristics which render it practicalfor industrial uses as well as for ventilated floor ing in general. e

Further and other objects of the present invention will be hereinafterset forth in the accompanying specication and claims and demonstrated bythe drawing which shows by way of illustration a preferred embodimentand the principle of my invention and what I now consider the best modein which I have contemplated applying that principle. Other embodimentsof the invention employing the same principle may be used and structuralchanges made as desired by those skilled in the art within the spirit ofthe appended claimsl and without departing from the present invention.

In the drawing,

Fig. 1 is a plan of a corner of a grating panel.

Fig. 2 is a section on line 2 2 of Fig, 1.

Fig. 3 is a section on line 3-3 of Fig. l.

The portion of the grating illustrated in Fig. 1 covers sufcient area toillustrate a manner of constructing a panel or floor area according tothe present invention, but it will be understood that the grating may bemade up in any size of panel desired and in accordance with practicesprevailing in the use of metallic grating.

The panel comprises beam elements or girders I0, arranged in parallelrows and spaced from each other. These are joined by cross-members IIwhich are arranged parallel to each other and in spaced relationship.The beam-elements are deeper than the cross-members but the upper edgesof both are disposed in the upper surface or oor of the grating.

Each beam I is provided with notches I2, Fig. 2, in its upper edge forengaging the sides of the cross-members at the places where the oormembers intersect. The cross-members also have complementary notches I3,Fig. 3, in their under edges which engage the sides of the beams. Thebottoms I4 of notches I2 and I3 are so situated with respect to thefloor of the grating as to posi tion the upper edges of the beams andcrossmembers in a common plane. The notches are preferably proportionedto cause snug engagement between their vertical walls and adjacentsurfaces of the floor members.

As may be seen clearly in Fig. 3, the beams have a stepped cross-sectionwith the narrowest width of the cross-sections at their upper edges. Thedepth of the cross-members is such as to locate their lower edges belowthe 'shoulders l5, ls, whereby the side walls of notches I3 extend overand contact with the side walls of the beams I El at 'their greatestwidth. This construction stii'fens the beam elements against lateraldeection.

TheV grating thus far described is especially suitable for making ofwood. Adhesives may be used forv making iirm the connections between thecrossing. members, or nails or other wood joining elements may be used.The wood can be sealed in with resinous lacquers for making the gratingimpervious to oils, acid and caustic drippings to which industrialgratings are frequently subjected.

The upper surface of the grating is provided with metallic strips I8,which, in the embodiment of the invention illustrated in the drawing,extend lengthwise along the upper edges of the beams. While the designsof these strips may assume proportions different from those illustrated,

it is intended that they project laterally of their center lines so thateach strip will provide a laterally expanded tread surface by whichtheir anti-friction capacity is increased. The Wave constructionillustrated is suitable for this purpose. The wave or crimp formationcan be easily imparted to flat strips of iron in a well-known manner.

The strips are deep enough to be embedded in the beams and extend abovetheir upper edges whereby they protect the floor of the grating andimprove the frictional resistance of the floor against slipping by auser.

While the strips could be embedded in the crossmemberal prefer to setthem on the beams and continue them without interruption over lthecross-members and thereby provide a means for anchoring thecross-members in place. The whole panel is thereby rendered more rigidand rugged against surface wear.

For fastening the strips in place, they may be forced edgewise into thewooden members by the use of a press. made to cut their own receivinggrooves and rmly secure themselves.

What is claimed is:

l. In a ventilated oor grating, the combination comprising parallelnon-metallic beam elements running lengthwise of the grating and spacedfrom each other, parallel non-metallic cross-members running crosswiseof the grating and spaced from each other, said cross-members havingnotches in their lower edges and said beam elements having notches intheir upper edges which engage at intersections of the cross- In suchprocedure they can bel members and beam elements, said notches being ofsuch depth as to contact at their bottoms and locate the upper edges ofthe beam elements and cross-bars in the floor of the grating, andmetallic strips extending along the Whole length of the upper edges ofthe beam elements and continuing over a series of cross-members forproviding Wear-protection for thenon-metallic Iloor surface, saidmetallic strips being embedded below the iloor surface of the gratingand interlocking the beam elements and cross-members at theirintersections and thereby locking the crossmembers down With the bottomsof the notches in contacting relationship.

2. In a ventilated floor grating, the combination comprising parallelnon-metallic beam lelements running lengthwise of` the grating andspaced from each other, eachoi` said beam elements having a depthgreater than its Widthvand a reduced cross-sectional area above theirlower edges and extending to the floor surface of the grating, parallelnon-metallic cross-members running crosswise of the grating and spacedfrom each other, said cross-members having notches in their lower edges`and said girder elements having notches in their upper edges whichengage With `the sides of the beam elements and crossmembersrespectively, said notches'being of such depth as to provide Contact ofthe bottoms of joined notches and locate the upper edges of the beamelements and cross-members in a plane, and metallic strips embedded inand longitudinally along the Whole length of the upper edges of the beamelements and in and across the cross-members where the cross-membersintersect the beam elements so as to provide wear-resistant material inthe floor of the grating surface and lock the non-metallic beams andcross-members together.

3. A ventilated floor comprising parallel beams 'spaced from each other,parallel cross-members Yspaced from each other and crossing said beams,

said beams and cross-members being non-metallic anduprovided withnotches at their intersections 'forlocking intersecting beams andcross-members together in a composite ventilated panel with the upperedges of the beams and cross-members lying in a single plane, metallicstrips embedded in the upper edges of said beams With their upper edgesextending above the upper edges of the beams for providing anti-slipcharacteristics to the floor surface of the panel, said metallic stripsrunning the Whole length of the beamsand being crimped cross-wise of thebeams to provide reverse beads in the strips for effecting reduction inthe possibility of slipping over the surface of rthe panel.

.HERBERT H. BUNKER.`

